{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{1}{cccc}}
\hline\hline
                    &\multicolumn{4}{c}{(1)}                            \\
                    &\multicolumn{4}{c}{}                               \\
                    &        mean&          sd&         min&         max\\
\hline
license             &       0.126&       0.332&           0&           1\\
Ban                 &       0.037&       0.189&           0&           1\\
wage                &      25.074&      15.463&           5&          99\\
black               &       0.125&       0.331&           0&           1\\
small firm (<=100 employees)&       0.596&       0.491&           0&           1\\
BTBstate            &       0.166&       0.372&           0&           1\\
age                 &      41.230&      12.235&          18&          64\\
age2                &    1849.613&    1015.694&         324&        4096\\
high-school         &       0.247&       0.431&           0&           1\\
some college        &       0.360&       0.480&           0&           1\\
college             &       0.237&       0.425&           0&           1\\
postgrad            &       0.117&       0.322&           0&           1\\
union               &       0.142&       0.349&           0&           1\\
government worker   &       0.169&       0.375&           0&           1\\
self-employed       &       0.031&       0.175&           0&           1\\
service             &       0.400&       0.490&           0&           1\\
take English Lit.   &       0.700&       0.458&           0&           1\\
take Advanced Math. &       0.544&       0.498&           0&           1\\
take Advanced Science&       0.526&       0.499&           0&           1\\
license for personal perference&       0.011&       0.105&           0&           1\\
less than high-school&       0.039&       0.194&           0&           1\\
\hline
Observations        &       30256&            &            &            \\
\hline\hline
\end{tabular}
}
